Slot type photo-thermal power station mirror field hydraulic oil station motor power supply circuit and slot type photo-thermal power station
By installing a soft-start module in the parabolic trough solar thermal power plant, the starting current of the motor is limited, which solves the problem of high cost caused by excessive starting current of the hydraulic oil station motor, and achieves cost savings and reduced communication interference.
Patent Information
- Application Number
- CN202422706102.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-06
AI Technical Summary
In existing parabolic trough solar thermal power plants, the starting current of the hydraulic oil station motor of the collector is large, which leads to high UPS power supply capacity requirements and excessive equipment and maintenance costs.
A soft starter module is installed in each power supply path, including a three-phase soft starter module, an input switch and a motor. The soft starter module performs soft start control to limit the motor's starting current.
It significantly reduces the motor's starting current, decreases the UPS power supply capacity requirements, lowers equipment and maintenance costs, and improves communication quality.
Smart Images
Figure CN223488115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of solar thermal power plants, and more specifically, to a power supply circuit for a hydraulic oil station motor in a parabolic trough solar thermal power plant and a parabolic trough solar thermal power plant. Background Technology
[0002] In current parabolic trough solar thermal power plants, each collector is driven by a 1kW motor with a rated current of 2A and a starting current of about 4 times, which is 8A. When selecting a UPS power supply, it is necessary to select one that is 1.5 to 2 times the maximum current of the solar field. However, UPS power supplies (with high wind protection and over-temperature protection) have large capacity, resulting in high equipment and maintenance costs. Since the solar thermal power plant's solar field consists of more than 700 collectors, the equipment cost increases significantly, leading to substantial cost waste. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a power supply circuit for the hydraulic oil station motor of the mirror field in a trough solar thermal power plant and a trough solar thermal power plant, addressing the problems existing in the prior art.
[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a power supply circuit for a hydraulic oil station motor in a trough-type solar thermal power plant, including: multiple power supply paths corresponding to the collectors in the mirror field;
[0005] Each of the aforementioned power supply paths includes: an AC input terminal, an input switch, a soft starter module, and a motor;
[0006] The AC input terminal is connected to the AC input voltage, the input terminal of the input switch is connected to the AC input terminal, the output terminal of the input switch is connected to the input terminal of the soft starter module, and the output terminal of the soft starter module is connected to the motor.
[0007] The input switch is used to control the on / off state of the AC power supply path;
[0008] The soft start module is used to perform soft start control during operation to limit the starting current of the motor.
[0009] In the power supply circuit of the hydraulic oil station motor of the trough-type solar thermal power plant mirror field described in this utility model, the soft start module is a three-phase soft start module.
[0010] In the power supply circuit of the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field described in this utility model, the soft start module includes: a three-phase input terminal, a main power supply module, a three-phase output terminal, and a start / stop switch;
[0011] The three-phase input terminal is connected to the output terminal of the input switch, the three-phase output terminal is connected to the motor, the main power module is connected to both the three-phase input terminal and the three-phase output terminal, and the start / stop switch is connected to the main power module; the start / stop switch is used to control the working state of the soft start module.
[0012] In the power supply circuit of the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field described in this utility model, the soft start module further includes: an adjustable unit connected to the main power supply module;
[0013] The adjustable unit is used to adjust the soft-start time and soft-start voltage of the soft-start module.
[0014] In the power supply circuit of the hydraulic oil station motor of the trough-type solar thermal power plant mirror field described in this utility model, the adjustable unit includes: a time adjustment module and a voltage adjustment module;
[0015] The time adjustment module is connected to the main power module and is used to adjust the soft start time of the soft start module;
[0016] The voltage regulation module is connected to the main power supply module and is used to regulate the soft start voltage of the soft start module.
[0017] In the power supply circuit of the hydraulic oil station motor of the trough-type solar thermal power plant mirror field described in this utility model, the input switch is a contactor.
[0018] In the power supply circuit of the hydraulic oil station motor of the trough-type solar thermal power plant mirror field described in this utility model, the contactor includes: an AC contactor or a solid-state relay.
[0019] In the power supply circuit of the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field described in this utility model, the AC contactor includes: a first input terminal, a second input terminal, a third input terminal, a first output terminal, a second output terminal, and a third output terminal;
[0020] The first input terminal is connected to the first end of the AC input terminal, the second input terminal is connected to the second end of the AC input terminal, and the third input terminal is connected to the third end of the AC input terminal;
[0021] The first output terminal is connected to the first terminal of the three-phase input terminal, the second output terminal is connected to the second terminal of the three-phase input terminal, and the third output terminal is connected to the third terminal of the three-phase input terminal.
[0022] In the power supply circuit of the hydraulic oil station of the trough-type solar thermal power plant mirror field described in this utility model, the motor is a three-phase motor;
[0023] The first input terminal of the three-phase motor is connected to the first terminal of the three-phase output terminal, the second input terminal of the three-phase motor is connected to the second terminal of the three-phase output terminal, and the third input terminal of the three-phase motor is connected to the third terminal of the three-phase output terminal.
[0024] This utility model also provides a parabolic trough solar thermal power plant, including the power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field as described above.
[0025] The parabolic trough solar thermal power plant's hydraulic oil station motor power supply circuit and the parabolic trough solar thermal power plant implementing this utility model have the following beneficial effects: Multiple power supply paths are provided corresponding to the collectors in the solar mirror field; each power supply path includes: an AC input terminal, an input switch, a soft starter module, and a motor; the AC input terminal is connected to the AC input voltage, the input terminal of the input switch is connected to the AC input terminal, the output terminal of the input switch is connected to the input terminal of the soft starter module, and the output terminal of the soft starter module is connected to the motor; the input switch controls the on / off state of the AC power supply path; the soft starter module performs soft start control during operation to limit the motor's starting current. This utility model utilizes the characteristics of the soft starter module to effectively control the starting current of each motor, significantly reducing the capacity of the UPS power supply unit and significantly saving economic costs. Furthermore, adding a soft starter module to reduce the starting current can also reduce electromagnetic interference, lower communication interference, and improve communication quality. Attached Figure Description
[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:
[0027] Figure 1 This is a schematic diagram of the system architecture of the power supply circuit for the hydraulic oil station motor of the trough-type solar thermal power plant mirror field provided by this utility model;
[0028] Figure 2 This is a schematic diagram of one embodiment of the power supply path provided by this utility model;
[0029] Figure 3 This is a schematic diagram showing the voltage change of the motor during the operation of the soft starter module provided by this utility model. Detailed Implementation
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0031] Figure 1This invention illustrates a preferred embodiment of the power supply circuit for the hydraulic oil station motor of the trough-type solar thermal power plant mirror field provided by this invention.
[0032] Specifically, such as Figure 1 As shown, the power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant's mirror field includes multiple power supply paths corresponding to the collectors in the mirror field. In this embodiment, the number of power supply paths is the same as the number of collectors in the parabolic trough solar thermal power plant's mirror field; that is, the number of power supply paths corresponds to the number of collectors. Specifically, as shown... Figure 1 As shown, if there are N collectors in the mirror field, namely #1 collector, #2 collector, #3 collector, ..., #N collector, then there are N power supply paths, namely #1 power supply path, #2 power supply path, #3 power supply path, ..., #N power supply path, where N is an integer.
[0033] Specifically, such as Figure 1 As shown, each power supply path includes: an AC input terminal, an input switch, a soft starter module 100, and a motor. The AC input terminal is connected to the AC input voltage, the input terminal of the input switch is connected to the AC input terminal, the output terminal of the input switch is connected to the input terminal of the soft starter module 100, and the output terminal of the soft starter module 100 is connected to the motor.
[0034] In this embodiment, the input switch is used to control the on / off state of the AC power supply path; the soft starter module 100 is used to perform soft start control during operation to limit the motor's starting current. Specifically, when the input switch is closed, the AC input voltage supplies power to the motor through the input switch and the soft starter module 100; when the input switch is open, the AC input voltage cannot pass through, and the motor's power is disconnected. Simultaneously, after the input switch is closed, when the soft starter module 100 is in operation, it performs soft start control, thereby limiting the motor's starting current and keeping it within the limit value set by the soft starter module 100.
[0035] Optionally, in this embodiment, the soft starter module 100 is a three-phase soft starter module 100.
[0036] In a preferred embodiment, such as Figure 2 As shown, the soft starter module 100 includes: a three-phase input terminal 101, a main power supply module, a three-phase output terminal 105, and a start / stop switch 102. The main power supply module... Figure 2 No illustration is provided.
[0037] The three-phase input terminal 101 is connected to the output terminal of the input switch, and the three-phase output terminal 105 is connected to the motor. The main power supply module is connected to both the three-phase input terminal 101 and the three-phase output terminal 105. The start / stop switch 102 is connected to the main power supply module. The start / stop switch 102 is used to control the operating state of the soft starter module 100. Specifically, by setting the start / stop switch 102, the soft starter module 100 can be turned on or off, thus controlling its operating state. Specifically, when the start / stop switch 102 is closed, the soft starter module 100 operates; when the start / stop switch 102 is open, the soft starter module 100 stops. When the start / stop switch 102 is closed, the main power supply module is powered, and the soft starter module 100 executes soft start control, initiating the soft start; when the start / stop switch 102 is open, the soft starter module 100 does not operate, and the soft start stops.
[0038] Furthermore, in this embodiment, the soft start module 100 further includes an adjustable unit connected to the main power module; wherein the adjustable unit is used to adjust the soft start time and soft start voltage of the soft start module 100.
[0039] Optional, such as Figure 2 As shown, the adjustable unit includes a time adjustment module 103 and a voltage adjustment module 104. The time adjustment module 103 is connected to the main power supply module and is used to adjust the soft-start time of the soft-start module 100; the voltage adjustment module 104 is connected to the main power supply module and is used to adjust the soft-start voltage of the soft-start module 100.
[0040] Specifically, in this embodiment, the time adjustment module 103 can adjust the soft-start time of the soft-start module 100, with an adjustable range of 0 to 30 seconds (where time rise refers to 0 to 380V). The voltage adjustment module 104 can adjust the soft-start voltage of the soft-start module 100, wherein the initial voltage is adjustable from 150V to 250V to the rated voltage (380V). The voltage change of the motor during the soft-start process is as follows: Figure 3 As shown.
[0041] In this embodiment, the soft starter module 100 is a soft starter, specifically a soft starter of model TSR-80WA-R. That is, this invention limits the starting current of the motor by connecting a soft starter in series between the motor and the contactor in the hydraulic station. It should be noted that the soft starter module 100 of this invention can also use other models of soft starters, not limited to TSR-80WA-R, as long as they have similar functions to TSR-80WA-R.
[0042] The working principle of TSR-80WA-R is explained below:
[0043] The soft starter uses three anti-parallel thyristors as voltage regulators, connected between the power supply and the motor stator. This circuit resembles a three-phase fully controlled bridge rectifier circuit. When starting the motor with the soft starter, the output voltage of the thyristors gradually increases, and the motor gradually accelerates until the thyristors are fully conducting. The motor then operates at its rated voltage mechanical characteristics, achieving a smooth start, reducing starting current, and preventing overcurrent tripping. Once the motor reaches its rated speed, the starting process ends, and the soft starter automatically replaces the thyristors with a bypass contactor, providing the rated voltage for normal motor operation. This reduces thyristor heat loss, extends the soft starter's lifespan, improves its efficiency, and prevents harmonic pollution of the power grid.
[0044] In this embodiment, the input switch is a contactor.
[0045] Optionally, the contactor may include an AC contactor or a solid-state relay. That is, the contactor can be either an AC contactor or a solid-state relay.
[0046] in, Figure 2 The example uses an AC contactor.
[0047] Specifically, such as Figure 2 As shown, the AC contactor includes: a first input terminal, a second input terminal, a third input terminal, a first output terminal, a second output terminal, and a third output terminal.
[0048] The first input terminal is connected to the first end of the AC input terminal, the second input terminal is connected to the second end of the AC input terminal, and the third input terminal is connected to the third end of the AC input terminal; the first output terminal is connected to the first end of the three-phase input terminal 101, the second output terminal is connected to the second end of the three-phase input terminal 101, and the third output terminal is connected to the third end of the three-phase input terminal 101.
[0049] Furthermore, in this embodiment, the motor is a three-phase motor. For example... Figure 2 As shown, the first input terminal of the three-phase motor is connected to the first terminal of the three-phase output terminal 105, the second input terminal of the three-phase motor is connected to the second terminal of the three-phase output terminal 105, and the third input terminal of the three-phase motor is connected to the third terminal of the three-phase output terminal 105.
[0050] Specifically, such as Figure 2 As shown, when the AC contactor is closed and the start / stop switch 102 is closed, the AC input voltage passes through the AC contactor and is then controlled by the soft start module 100 to limit the starting current of the motor, thereby achieving the purpose of reducing the starting current of the motor.
[0051] In one specific embodiment, a parabolic trough solar thermal power plant has 760 collectors in its mirror field. Normally, the starting current of the hydraulic oil station motor for one collector is 4 to 7 times its rated current. The hydraulic oil station motor has a power output of 1 kW, a power factor of 0.8, and a rated current of approximately 2 A, resulting in a starting current of 8 to 14 A. A 50MW parabolic trough solar thermal power plant with 760 collectors would have a total starting current of 760 multiplied by 8 to 14 A, or approximately 10,000 A. Configuring a UPS power supply based on this current would significantly increase costs. To reduce the UPS capacity, this invention configures each hydraulic oil station motor with a soft-start module 100, controlling the starting current of each motor to within twice its rated current, thus limiting the starting current of each motor to within 4 A. This reduces the total starting current of the mirror field to approximately 3,000 A, a significant reduction from the previous 10,000 A, thereby substantially reducing the total current of the mirror field and consequently, multiplying the UPS power supply capacity. One soft starter module costs about 200 yuan each, and 760 modules cost about 150,000 yuan in total. This is at least 1.5 million yuan cheaper than the cost of a UPS power supply unit, significantly reducing the procurement and maintenance costs of the power supply.
[0052] This utility model also provides a parabolic trough solar thermal power plant, which includes the power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field disclosed in the embodiments of this utility model.
[0053] By setting up the power supply circuit for the hydraulic oil station motor of the solar thermal power plant mirror field, the total current of the mirror field can be greatly reduced, thereby significantly reducing the capacity of the UPS power supply unit and greatly reducing the power procurement and maintenance costs of the mirror field.
[0054] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They do not limit the scope of protection of this utility model. All equivalent changes and modifications made within the scope of the claims of this utility model should fall within the scope of the claims of this utility model.
Claims
1. A power supply circuit for a hydraulic oil station motor in a parabolic trough solar thermal power plant's mirror field, characterized in that, include: Multiple power supply paths are set up corresponding to the solar collectors in the mirror field; Each of the aforementioned power supply paths includes: an AC input terminal, an input switch, a soft starter module, and a motor; The AC input terminal is connected to the AC input voltage, the input terminal of the input switch is connected to the AC input terminal, the output terminal of the input switch is connected to the input terminal of the soft starter module, and the output terminal of the soft starter module is connected to the motor. The input switch is used to control the on / off state of the AC power supply path; The soft start module is used to perform soft start control during operation to limit the starting current of the motor.
2. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to claim 1, characterized in that, The soft starter module is a three-phase soft starter module.
3. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to claim 1, characterized in that, The soft starter module includes: a three-phase input terminal, a main power supply module, a three-phase output terminal, and a start / stop switch; The three-phase input terminal is connected to the output terminal of the input switch, the three-phase output terminal is connected to the motor, the main power module is connected to both the three-phase input terminal and the three-phase output terminal, and the start / stop switch is connected to the main power module; the start / stop switch is used to control the working state of the soft start module.
4. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to claim 3, characterized in that, The soft start module further includes: an adjustable unit connected to the main power module; The adjustable unit is used to adjust the soft-start time and soft-start voltage of the soft-start module.
5. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to claim 4, characterized in that, The adjustable unit includes: a time adjustment module and a voltage adjustment module; The time adjustment module is connected to the main power module and is used to adjust the soft start time of the soft start module; The voltage regulation module is connected to the main power supply module and is used to regulate the soft start voltage of the soft start module.
6. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to any one of claims 3-5, characterized in that, The input switch is a contactor.
7. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to claim 6, characterized in that, The contactor includes: an AC contactor or a solid-state relay.
8. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to claim 7, characterized in that, The AC contactor includes: a first input terminal, a second input terminal, a third input terminal, a first output terminal, a second output terminal, and a third output terminal; The first input terminal is connected to the first end of the AC input terminal, the second input terminal is connected to the second end of the AC input terminal, and the third input terminal is connected to the third end of the AC input terminal; The first output terminal is connected to the first terminal of the three-phase input terminal, the second output terminal is connected to the second terminal of the three-phase input terminal, and the third output terminal is connected to the third terminal of the three-phase input terminal.
9. The power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field according to any one of claims 3-5, characterized in that, The motor is a three-phase motor; The first input terminal of the three-phase motor is connected to the first terminal of the three-phase output terminal, the second input terminal of the three-phase motor is connected to the second terminal of the three-phase output terminal, and the third input terminal of the three-phase motor is connected to the third terminal of the three-phase output terminal.
10. A parabolic trough solar thermal power plant, characterized in that, Includes the power supply circuit for the hydraulic oil station motor of the parabolic trough solar thermal power plant mirror field as described in any one of claims 1-9.